DE102007020869B3 - Device for ships, has openings for deriving gaseous and liquid medium, particularly exhaust gases, in underwater area of ship wall of hull, over suctioning effect produced by outer current - Google Patents

Abstract

The device has an opening (8) for deriving gaseous and liquid medium, particularly exhaust gases, in the underwater area of a ship wall of a hull, over suctioning effect produced by outer current. The flow duct element (1) takes place in the current flowing of the channel formation (5), is arranged for the ship wall (7) and flow duct element holds to assign the integrated flow-type body (3), which is externally engaged over a positioning medium for increasing the suctioning effect in the angle and for flow. The channel design (6) is adjusted in distance for flow duct element.

Description

The The invention relates to a device for ships with openings for discharging gaseous and / or more fluid Media, in particular exhaust gases, in the underwater area of a ship's wall of a Hull, over through Outside currents generated Suction effect.

It is known to the outside flow to Extraction effect of openings in ship walls. It becomes one at the ship's wall Underwater area usually arranged shell-shaped shield with an opening used against the direction of travel, which affects a flow and through the effect of a deflected outer flow entrained the exit flow becomes. This is the defect that due to the rigid training an effect exclusively of dependent on the speed of the outside flow and thus often is not efficient. With respect to the occurring resistance acceptable training or shaping is the suctioning effect at low speeds relatively low and at high speeds too high.

It is according to the EP 1 566 333 A1 an arrangement for the discharge of media in the underwater area has become known, wherein a lying in the ship's wall outlet is partially covered by a fixed profiled deflector.

Further, according to the DE 195 49 012 A1 also a lying in the ship's outlet for discharge has become known, wherein a flow body at the outlet opening in the external control is assigned and shaped so fixed that a double-sided flow around the flow body is ensured and a negative pressure can be generated.

The The object of the invention is to provide a generic arrangement and to improve known devices in a simple manner such that an the speed of the outside or outflow Adjustment allows and a uniform suction effect over a huge Speed range is ensured resistance.

The solution This object is achieved according to the invention in that a channel education with the opening over the Schiffswandung out to the outside guided is and an angle of attack relative to the direction of travel of the ship has, wherein at least in the inflow of the channel formation a flow guide element is arranged starting from the ship's wall and the flow guide element has an associated integrable flow body, which via adjusting means to increase the suction effect at an angle to the outside and / or to flow around and channel formation at a distance from the flow guide element is adjustable.

hereby Is it possible, to consider different speeds and a relative to set constant suction effect.

Farther becomes unaffected Arrangement by changes the static pressure level due from waves or shipwrecks suggested that the Channel training with the opening in the The ship or the stern of the ship is arranged.

Around the conditions without significant external flow and without suction effect to take into account It is suggested that the Channel formation with a connecting line of a communicating surface water outlet is connected and the pressure conditions at the withdrawals in dependence the outside flow over and / or Underwater outlet stops.

In the drawing is an embodiment of Invention shown schematically. Show it:

1 an arrangement in a low-resistance starting position with low momentum change;

2 an arrangement according to 1 with a spaced flow body and high momentum change and

3 an arrangement according to 1 and angled flow body and high momentum change.

In the illustrated arrangement is a channel formation 5 with an opening 8th over a ship's wall 7 led out and arranged in a pitch opposite to the direction of travel. In the inflow area is the channel formation 5 starting from the ship's wall 7 with a flow guide element 1 fitted. In the basic position is in the flow guide element 1 a flow body 3 integrated.

The flow body 3 is pivotable about not shown adjusting elements at an angle ( 3 ) or at a distance from the flow guide element 1 ( 2 ) adjustable to achieve a pulse change. This is an interaction with an outward or outflow 4 and thus the suction effect of the opening 8th adjustable.

The effect on the pressure distribution in the off The outlet channel is dependent on the momentum change of the outside flow. This is at high speeds by a low-resistance flat shape of the flow guide element 1 with the integration of the flow body 3 reached. Due to the high kinetic energy of the outer flow 4 the desired suction effect is sufficient. At low external flows, the desired pulse change or the suction effect by a steeper, further beyond the ship's wall shaping by pivoting or extending the spaced flow body 3 reached. Here is the effect of the flow body 3 more efficient, if this also has a suction side flow 6 having. The most even extraction of the opening 7 over a wide range of speeds depends not only on the relative pressure generated by the device, but also on the absolute pressure, in particular on the static water level at the point of exit. For an optimal design of the device, it is thus important to choose a location with the lowest possible stationary water level height or the smallest possible changes in the water level heights when driving and swell, preferably aft in midships range for the exit. Since no device without suction or without external flow, the device has no suction, it makes sense, an underwater outlet 8th to connect or combine with an overwater outlet.

By such an adjustable arrangement, it is thus possible without fittings in the feeders, depending on the use condition, the outlet flow of the openings 8th to regulate. Thus, it is possible to use the back pressure by the static water level quasi as a closure in port operation or small trip, which emerges with appropriate design, the flow of water. At medium speed or outside speed can by adjusting the full suction, by extending the flow body 3 the outlet volume flow can be adjusted. At full speed or outer speed, the suction effect continues to increase, the adjustment of the flow body 3 is withdrawn and realized the lowest possible resistance. With appropriate design, it is also possible that sucked in by the suction underwater additional outside air over the surface water outlet and thus the exhaust gas is cooled.

Claims (3)

Device for ships with openings for discharging gaseous and / or liquid media, in particular exhaust gases, in the underwater area of a ship's hull, via suction effect generated by external flows, characterized in that a channel formation ( 5 ) with the opening ( 8th ) over the ship's wall ( 7 ) out to the outside and has an angle of attack relative to the direction of travel of the ship, wherein at least in the inflow of the channel formation ( 5 ) a flow guide element ( 1 ) starting from the ship's wall ( 7 ) is arranged and the flow guide element ( 1 ) an associated integrable flow body ( 3 ), which can be adjusted by means of adjusting means for increasing the suction effect at an angle to the outside and / or to the flow around and channel formation ( 6 ) at a distance to the flow guide element ( 1 ) is adjustable. Apparatus according to claim 1, characterized in that the channel formation ( 5 ) with the opening ( 8th ) is arranged in the nave or stern of the ship. Apparatus according to claim 1 or 2, characterized in that the channel formation ( 5 ) is connected to a connecting line of a communicating surface water outlet and adjusting pressure conditions at the outlets in response to the outside flow adjusts an over- and / or underwater outlet.